In order to reduce server load we have recently changed a setting regarding new post marking. When you log out, the database will no longer keep information on which threads you have read and which you have not. This feature puts a considerable amount of stress on the server and is necessary to make sure that VT keeps running quickly and smoothly. You can still view which threads have been posted on the current day by clicking "New Posts" in the navbar. I apologize for any inconvenience.